OskaDev

OskaDev

Pre & Post Function

Most of the time this is a common mistake of myself when i code.

Pre Function

Pre function mean the function already fixed and unable to change later.

const scope = {
    fn: () => console.log("OK")
};
const fn = scope.fn();
scope.fn = () => console.log("NOT OK");
fn();

// OK

Lazy / Post Function

Post function mean the function maybe will change anytime, changable after initialize. It also like a lazy function.

const scope = {
    fn: () => console.log('OK')
}
const fn = () => scope.fn();
scope.fn = () => console.log("NOT OK");
fn();

// NOT OK
 
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